Microchip MIC94310-SYM5-TR, 1 DC-DC, Voltage Regulator 200mA, 4 V 5-Pin, SOT-23

The microchip MIC94310 ripple blocker is a monolithic integrated circuit that provides low-frequency ripple attenuation (switching noise rejection) to a regulated output voltage. This is important for applications where a DC/DC switching converter is required to lower or raise a battery voltage, but where switching noise cannot be tolerated by sensitive downstream circuits such as in RF applications. The MIC94310 maintains high power supply ripple rejection (PSRR) with input voltages operating near the output voltage level to improve overall system efficiency. A low-voltage logic enable pin facilitates ON/OFF control at typical GPIO voltage levels. The MIC94310 operates from an input voltage of 1.8Vto 3.6V. It is used in smartphones/smart books , mobile computing, video cameras, automotive and industrial applications.

The input voltage range is 1.8V to 3.6V
Active noise rejection over a wide frequency
band: >50 dB from 10 Hz to 10 MHz at 200 mA load
Rated output current is to 200 mA
It is current-limit and thermal-limit protected